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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [arm/] [arch/] [v2_0/] [src/] [hal_syscall.c] - Rev 27
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//============================================================================= // // hal_syscall.c // // // //============================================================================= //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //============================================================================= //#####DESCRIPTIONBEGIN#### // // Author(s): msalter // Contributors:msalter // Date: 2000-11-5 // Purpose: // Description: // // // //####DESCRIPTIONEND#### // //============================================================================= #include <pkgconf/hal.h> #ifdef CYGPKG_REDBOOT #include <pkgconf/redboot.h> #endif #if defined(CYGSEM_REDBOOT_BSP_SYSCALLS) #include <cyg/hal/hal_stub.h> // Our header #include <cyg/hal/hal_arch.h> // HAL_BREAKINST #include <cyg/hal/hal_cache.h> // HAL_xCACHE_x #include <cyg/hal/hal_intr.h> // interrupt disable/restore #include <cyg/hal/hal_if.h> // ROM calling interface #include <cyg/hal/hal_misc.h> // Helper functions extern int __do_syscall(int func, // syscall function number long arg1, long arg2, // up to four args. long arg3, long arg4, int *retval, // syscall return value int *sig); // signal to return (or 0) #define SYS_exit 1 #define SYS_interrupt 1000 int hal_syscall_handler(void) { int func, arg1, arg2, arg3, arg4; int err, sig; #if 0 union arm_insn inst; // What is the instruction we were executing // inst.word = *(unsigned long *)(regs->_pc - ARM_INST_SIZE); // Not a syscall. Don't handle it if ((inst.swi.rsv1 != SWI_RSV1_VALUE) || (inst.swi.swi_number != SYSCALL_SWI)) return 0; #endif func = get_register(R0); arg1 = get_register(R1); arg2 = get_register(R2); arg3 = get_register(R3); arg4 = *(unsigned int *)(get_register(SP) + 4); if ((get_register(PS) & CPSR_MODE_BITS) == CPSR_SUPERVISOR_MODE) put_register(PC, get_register(IP)); else put_register(PC, get_register(LR)); if (func == SYS_interrupt) { // A console interrupt landed us here. // Invoke the debug agent so as to cause a SIGINT. return SIGINT; } if (__do_syscall(func, arg1, arg2, arg3, arg4, &err, &sig)) { put_register(R0, err); return sig; } return SIGTRAP; } #endif // CYGSEM_REDBOOT_BSP_SYSCALLS
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